Insulated Flexible Ductwork / HVAC Duct

Insulated Flexible Ducting is a great product for the Homeowner or Professional. It’s easy to use and pre-insulated so no additional wrapping is needed.

Used in standard Heating & Air Conditioning systems and some venting applications. The duct has R6 insulation which contains 33% more insulation than the standard R4.2 product. This additional insulation provides greater thermal efficiency to help save energy and money. The product is covered in a heavy duty, silver jacket for durability and reflectivity. The flexible duct is ETL listed, meeting the UL181 standard.

F6IFD Series - Master Flow’s F6IFD Series Insulated Flexible Duct


  • R6 fiberglass insulation for greater insulating power
  • Flexible duct is convenient for use in multiple applications including heating & A/C systems and some venting.
  • Thick insulation blanket for increased comfort & efficiency
  • Duct can be cut to length as needed
  • Insulated flexible duct features a maximum temperature rating of 200 degrees Fahrenheit
  • Always install per instructions and seal using approved mastic or sealant (or approved tape)



Insulated Flexible Ductwork

Used in standard Heating & Air Conditioning systems and some venting applications. The duct has R8 insulation which contains 50% more insulation than the standard R4.2 product. This additional insulation provides greater thermal efficiency to help save energy and money. The product is covered in a heavy duty, silver jacket for durability and reflectivity. The flexible duct is ETL listed, meeting the UL181 standard.

F8IFD Series - Master Flow’s F8IFD Series Insulated Flexible Duct.


  • R8 fiberglass insulation for greater insulating power
  • Flexible duct is convenient for use in multiple applications including heating & a/c systems and some venting.
  • Thick insulation blanket for increased comfort & efficiency
  • Duct can be cut to length as needed
  • Insulated flexible duct features a maximum temperature rating of 200 degrees Fahrenheit
  • Always install per instructions and seal using approved mastic or sealant (or approved tape)



Insulated Flexible Ductwork

Used in Manufactured and Mobile Home Heating and Air Conditioning systems and some venting applications. The product has R4.2 insulation which provides good thermal efficiency to help save energy and money. The extra heavy black polyethylene jacket with UV inhibitors allows for outdoor applications as well as indoor applications. The flexible duct is ETL listed, meeting UL181 standard.

MIF Series - Master Flow’s MIF Mobile Home Insulated Flexible Duct


  • R4.2 fiberglass insulation
  • Flexible duct is convenient for use in Manufactured and Mobile Home Heating & A/C systems including and some venting applications.
  • Thick insulation blanket for increased comfort & efficiency
  • Duct can be cut to length as needed
  • Insulated flexible duct features a maximum temperature rating of 200 degrees Fahrenheit
  • Always install per instructions and seal using approved mastic or sealant (or approved tape)



Product availability is subject to change without notice. Not all products are available from all facilities.


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